Clean Water Act discharge permit · NPDES MO0054585
CLARK WWTF, Clark, MO: NPDES MO0054585 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
CLARK WWTF, held by City of Clark, holds NPDES permit MO0054585, which discharges to Tributary To Big Creek. EPA’s file records it issued February 10, 2017 and expiring September 30, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | CLARK WWTF |
|---|---|
| Permittee as filed | City of Clark |
| NPDES ID | MO0054585 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | February 10, 2017 |
| Expiration date | September 30, 2021 |
| Address | Clark, MO 65243 |
| Receiving water | Tributary to Big Creek |
| Subwatershed | Headwaters Reese Fork (HUC 071100060304) |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 12Pollutants on file
- 11Under a numeric limit
- 10With a violation of any kind
- 6With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 4 | 14 | 10 | March 31, 2026 | 611% over the limit |
| Solids, total suspended | 2 | 18 | 4 | December 31, 2024 | 38% over the limit |
| Solids, suspended percent removal | 1 | 5 | 3 | June 30, 2023 | 29% over the limit |
| Ammonia [as N] + unionized ammonia | 0 | 2 | 2 | November 30, 2015 | 21% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 15 | 1 | May 31, 2015 | 18% over the limit |
| BOD, 5-day, percent removal | 1 | 3 | 1 | March 31, 2020 | 32% over the limit |
| pH | 1 | 22 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 14 | 0 | ||
| E. coli | 4 | 8 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 6 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 6Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 31, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| November 14, 2024 | Permit Violations - Unapproved Operation | ST6 |
| November 14, 2024 | Permit Violations - Discharge Without a Valid Permit | ST6 |
| August 25, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
| August 25, 2020 | Effluent Violations - Numeric effluent violation | ST6 |
| August 25, 2020 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MO0054585 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.